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Note 5 - Diluted Net Income Per Share - Diluted Net Income Per Share (Details) - USD ($)
shares in Thousands
3 Months Ended 9 Months Ended
Feb. 28, 2016
Mar. 01, 2015
Feb. 28, 2016
Mar. 01, 2015
Numerator:        
Net income (loss) $ (21,190,000) $ 3,772,000 $ (16,370,000) $ 9,348,000
Denominator:        
Weighted average shares for basic net (loss) income per share (in shares) 27,054 26,886 27,026 26,863
Effect of dilutive securities:        
Stock options and restricted stock units (in shares) 477 451
Weighted average shares for diluted net (loss) income per share (in shares) 27,054 27,363 27,026 27,314
Diluted net (loss) income per share (in dollars per share) $ (0.78) $ 0.14 $ (0.61) $ 0.34